If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.

PROBLEMS
(SYMPTOMS)

POSSIBLE AREAS OF
MISADJUSTMENT(S)

RECOMMENDED
COURSE OF ACTION

FUNCTION PROBLEMS

The engine will NOT go to high
speed when either a welding load
or an auxiliary load is connected to
the SA-250.

The machine has normal output
and engine speed when the Idler
Control switch is in the “High” posi-
tion.

1. Check the welding cables and

auxiliary load leads for loose or
faulty connections.

2. Check for mechanical restric-

tions or missing parts in the idler
and throttle linkage (springs,
etc.).

1. The idler PC board may be

faulty. Replace.

The engine will not shut down.

1. Make sure the ignition switch

is turned off and operating cor-
rectly.

1. Check the fuel injection pump

for proper operation. When
12VDC is applied to the pump at
leads #59C (+) to #60(-), the
fuel pump should be working.
When the 12VDC is removed,
the pump should stop pumping
fuel to the engine.